SA118390477B1 - Apparatus for producing spunbonds from continuous filaments - Google Patents

Abstract

The invention relates to a device for producing spunbonds from endless filaments, comprising at least one spinneret, at least one cooling device, at least one stretching device and comprising at least one depositing device for depositing the filaments. At least one diffusor is arranged between the stretching device and the depositing device so that filaments and primary air from the stretching device enter into the diffusor. In the region of the at least one diffusor at least two secondary air inlet gaps arranged on opposite sides of the diffusor are provided. At least one secondary air inlet gap is formed with the proviso that the secondary air flows in at an angle α with respect to the filament flow direction FS, wherein the inflow angle α is less than 100°. An extraction device for extracting air through the depositing device. An extraction region arranged underneath the diffusor outlet has a width b in the machine direction which is greater than the width B of the diffusor outlet.

Description

APPARATUS FOR PRODUCING SPUNBONDS FROM CONTINUOUS FILAMENTS FULL DESCRIPTION BACKGROUND The invention relates to a device for producing spunbonds from continuous filaments, specifically continuous filaments consisting of refractory Bale thermoplastic plasticization for “Gus 022” comprising at least one spinneret prepared for spinning connected filaments PENI at least one cooling device prepared for cooling the filaments”; At least one stretching device designed to stretch the hairs; And at least one depositing device prepared to deposition the filaments to form a nonwoven web. By the connected filaments within the scope of the invention, we mean those filaments that have a continuous length of approximately. In this respect, these connected filaments differ from the staple fibers, which have much shorter lengths, where 0 is; For example JE from 10 to 60 mm In fact, the ball-type Bead is known from the application in the various embodiments. These devices are also associated with das (spunbond apparatuses) and many devices of this type are known to have a bad application which is that at high capillary speeds and production rates or productivity values lle the sedimentation quality of the capillaries is considered insufficient . specifically; This is related to the homogeneity of sedimentation and the durability of the resulting nonwoven webs. Alle filament speeds and low resulting continuous filament gauges can often be reached only with a significant loss of quality of the resulting nonwoven webs. Accordingly; Hardware AL is known to improve in this aspect. International Patent Application No. A1 064029/2014 discloses an apparatus for the production of bonded fiber 0 spun from filaments; Where the device also includes a spindle; Awd device, che device, and sedimentation device for capillary sedimentation. A spreader is placed between the stretching device and the sedimentation device, and two gaps are provided

Two secondary air inlets for secondary air entering the diffuser. However; This device also leaves something to be desired in terms of capillary sedimentation quality. The same reasons apply to the device disclosed in European Patent No. A1 2584076. This device also contains the components described at the outset to produce continuous filaments. Diffusers are also provided, and in the lower area of the device, a structural component containing a convergent and divergent part is provided. The precipitated filament or the precipitated non-woven filament does not meet the requirements with regard to the required quality. European Patent No. A1 1,630,265 also discloses an apparatus for producing interconnected fibers spun from continuous filaments. This device also contains the components described in 0 Start. The diffusers consisting of convergent diffuser parts and divergent diffuser parts are supplied and a narrowing is formed between them. Basically, this device proved to be a success. However; There are possibilities for modification or improvement. accordingly; The invention is based on the technical problem which is to provide a device of the aforementioned type at the beginning where Alle filament speeds and low calibers can be reached in addition to 5 high production rates. The deposition quality of BS nonwoven filament or mesh meets the requirements. The general description of the invention to solve this technical problem; The teachings of the invention mention a device for producing interconnected fibers spun from continuous filaments; specifically from a thermoplastic material; It includes at least one spindle of 0 intended for spinning continuous filaments; At least one cooling device is set up to cool the filaments; at least one stretching device prepared for stretching the filaments and including at least one depositing device in the form of a depositing foraminous belt designed to deposition the filaments to form a non-woven web; Cus arrange at least one diffusor between the stretching device and the sedimentation device so that 5 capillaries and primary air enter from the stretching device to the gall where in the area where

It has at least one publisher; At least two secondary air inlet gaps shall be provided on opposite sides of the diffuser where secondary air is entered into the diffuser; Gua At least one secondary air intake cavity is formed; At least two secondary air inlet holes are preferred, provided that the secondary air flows at an inflow angle alpha relative to the capillary flow direction and s or with respect to the longitudinal central plane (m) of the device or yall where the angle is less Alpha inflow of C100 suitably Alpha inflow angle less than 100"; suitably less than or equal to 90"; preferably less than ols 0 less than 70" and specifically less than 65"; where in the direction of flow of the capillaries after or below the secondary air entry gaps; followed by 0 contiguous diffuse fraction; where in the direction of flow of the capillaries the convergent part of the diffuser is followed by a narrowing of the diffuser and where the stenosis is followed by gia at least one divergent diffuser; Cus the convergent spreader edn is designed to be shorter or much shorter than a spaced spreader and where the length of the converging spreader portion is 760 max the length of the divergent spreader segment; Where the last part of the diffuser in the direction of capillary flow and S has diffusor walls where it deviates towards the sedimentation device, where these diffusor walls form an outlet for the diffusor outlet where it has a width B towards the machine direction M D where it is Provide at least one extraction device to extract the air or process air passing through the sedimentator or through the pore sedimentation belt and where the 0 extraction region arranged below the outlet of the diffuser has a width of 0 b" towards the machine m d greater than the width of outlet b Spreader. The direction of the machine MD within the scope of the invention specifically means the direction of transmission for the deposition of filaments or a non-woven mesh on the sedimentation apparatus or on the sedimentation puncture belt. It falls within the scope of the invention that the extraction area that has width B extends under the spreader along the width ( ASH b to the outlet of the spreader.It falls within the scope of the invention that the extraction zone 5 is determined by two barriers arranged sequentially towards the machine.Specifically, the width of (b) the extraction zone is measured between the two upper ends- opposite to the direction of sedimentation or the perforated sedimentation flow-

of the two barriers toward the machine. Conveniently, at least one extraction fan shall be provided by means of which the process air is extracted in the extraction area through the sedimentation device or through the puncture sedimentation belt. According to one embodiment of the invention, several extraction zones may be sequentially arranged towards the machine—for example, three extraction zones; Specifically, they differ from each other in terms of their extraction speed. and then; The extraction area claimed for protection in claim 1 is the main extraction area arranged below the publisher exit or directly below the publisher exit. And initially;. The extraction area or the main extraction area arranged under the outlet of the spreader or directly under the outlet of the spreader can be divided into sections; For example; by barriers. From od this extraction area or this main extraction area can be distinguished as 0 the extraction velocity is formed equal or substantially equal along the total width (TQ) of the extraction area. appropriately; The average extraction speed varies in the extraction area or the main extraction area le not more than 720, specifically le not more than 730, or le not more than 740, specifically not more than 7250. In this regard, it falls within the scope of the invention that in An additional extraction area arranged before the machining area or the main extraction area with respect to machine direction 5 m d according to gaa embodiments and/or an additional extraction area arranged after the machining area or the main extraction area with respect to the machine direction (m d)” so there is extraction speed

It differs from the extraction speed of the extraction area or the main extraction area. and according to a specifically desirable embodiment of the invention; The width (GQ) of the extraction area is at least 1.2 times greater than the width (b) of the outlet of the spreader; Preferably not less than 1.3 times diag 0 in particular not less than 1.4 times diag. According to one embodiment; The width of (b) the extraction area is at least 1.5 times greater than the width of (b) the outlet of the spreader; Specifically, no less than

6 times or la is not less than 1.7 times. One by far the preferred embodiment of the apparatus according to the invention is that the extraction zone protrudes with respect to the machine direction MD after the capillary deposition zone oa first extraction above the outlet of the spreader and/or where the extraction zone protrudes relative to the machine MD before the deposition zone in Capillaries ga a second extraction over the width of the outlet of the spreader. preferably; highlight area

The extraction or the main extraction area on both sides with respect to width (b) having above call (b) of the spreader outlet and particularly on one side by the first extraction part and on the other side by the second extraction gia. appropriately; The width gal (1'Q) of the first extraction and/or width (bd) of the second extraction gal is from 2 to 230 preferably from 2.5 to 725 and specifically preferable from 3 to 720 from the width (B) of the spreader outlet. One by far the preferred embodiment of the apparatus according to the invention is that extraction by means of an extractor takes place provided calf is at least in the outlet area of the diffuser; tertiary air flows along the outer surfaces of the diffusor walls towards the sedimentator or belt sedimentation, and that at least part of this tertiary air is extracted through a sedimentation device or a pore sedimentation belt. It is within the scope of the invention that the AE air flows are preferably aligned parallel or substantially parallel to the mixed flow consisting of primary air and secondary air flowing towards the outlet of the diffuser into the diffuser. It is desirable that the volumetric flow of air IE (litres) extracted using the extractor not be less than 725; preferably not less than 730; Preferably not less than 740 and specifically thanks to not less than 750 of the volumetric flow 5 of the two extracted primary and secondary air flows. The previously described preferred extraction of tertiary air has proven somewhat successful since the unwanted turbulence in the sedimentation zone of the capillaries can thus be avoided. According to the invention, the attached filaments are produced using a spunbond apparatus and patches within the scope of the invention that the canal stretching device and at least one spreader 0 extend transversely towards the machine m d along the width of the production or along the width (width d c) for the non-woven mesh to be produced. and according to a particularly preferred embodiment of the invention; The unit comprising the cooling device and the stretching device shall be formed as a closed unit and away from the cooling air supply in the cooling device; No additional fluid medium supply or any additional air supply takes place in this closed unit of the cooling and stretching device. This closed unit or this closed system Lalas 5 is particularly well established within the invention and contributes effectively to the solution of the technical problem.

Say that the cooling device in the device according to the invention includes only one cooling chamber Gus The process is performed on the capillaries using cooling air or treatment air at a specific temperature. According to a further embodiment of the invention; The refrigeration apparatus consists of two refrigeration chambers arranged on top of each other or in series. In these two cold chambers, the filaments can be processed using cooling air or curing air at different temperatures. The device can also be configured so that the exit speed of the process air coming out of an upper cooler chamber is set to cool the capillaries and the exit speed of a lower cooler chamber is different.

The two secondary air intake holes or for the secondary air that is introduced through these two secondary air intake holes shall have a Baise deal within the scope of the invention. By this case; It is within the scope of the invention that the two secondary air intake holes extend along the entire width of the device transversely to the direction of the machine (in the C-D direction). According to a considerably preferred embodiment of the invention, the two opposite secondary air intake gaps are arranged between the stretcher and the diffuser which is connected to the stretcher. According to one embodiment of the invention, two diffusers are arranged in succession in the direction of the capillary flow and two opposite secondary air intake gaps are provided between the diffusers. The two secondary air intakes can be arranged at the same vertical height. is that; It is also within the scope of the invention that the two secondary air intake holes are provided at different vertical heights of the device. and according to a preferred embodiment of the invention; Two air intake manifolds are provided

The two secondary ones only, and it is especially preferred between the stretching device and the spreader. The inflow angle (Wl) of the secondary air is of particular importance. According to the invention; At least one secondary air intake cavity and preferably at least two secondary air intake gaps shall be formed; 0 and two secondary air intake gaps are specifically preferred provided that the secondary air flows at an inflow angle (α) with respect to the capillary flow direction and s. One foamed embodiment has the advantage that the inflow angle is less than 90*; Preferably less than 80, preferably less than 70, and preferably less than 65. In this case; It has proved the inflow angle of less than 60"; preferably less than 55*; preferably less than 50". According to one very popular embodiment; 5 internal flow angle (alpha) ranges from 0.0" to 60"; appropriately from 1" to 55"; preferably from 2" to 50"; And the best, preferably from 2" to 45", and specifically preferable from 2 to 40".

Especially that the internal flow of secondary air takes place, provided that after entering it; The secondary air flows parallel to the flow direction of the capillaries and s.

leg appropriately; Ligh the secondary air intake gaps according to UN to reach the inflow angle A and specifically prepared with the help of inflow curves and/or inflow channels and the like. and according to a preferred embodiment” in order to use the inflow angle (alpha) in the area where the secondary air intake Sad is located; le wall is provided for the inflow where it joins on or connects to the wall of the spreader on the spreader; It encloses the inflow wall at an angle to the direction of the capillary flow that corresponds or is substantially symmetrical to the inflow angle (alpha). preferably in this embodiment; A wall opposite the inflow shall be provided for each of the two secondary air intake holes. It is desirable that 0 form this inflow wall ane of the inflow to use the inflow angle (alpha). The use of the inward flush angle (Wl) according to the invention has proved particularly successful within the scope of the invention and contributes effectively to the solution of the technical problem. In addition to the shape of the extraction area according to the invention, a high-quality deposition of the capillaries and a homogeneous non-woven network (dag) can be obtained. It has a closed system or unit form which includes the refrigeration device and the Lal device

5 as a closed dial unit defined within the combination range of device parameters. The main air within the framework of the invention means the process air directed through the stretching device that emerges from the stretching device or from the lead stretching shaft to the spreader. The more favorable embodiment of the present invention has the advantage that in the area of the two secondary air intake holes; the ratio between the volumetric flows of the primary air and the secondary air (T/T) is less than 5; Preferably 0 less than 4.8 and preferably less than 4.5. In accordance with the recommended embodiment of the invention; The volumetric flow of secondary air coming through the two secondary air intake holes is preferably adjustable tunable for each secondary air intake hole and according to one of the embodiments; Tunable independently of each other. It is desirable that the cross-section of the secondary air intake manifolds be variable or adjustable. appropriately; The secondary air volumetric flow through the two gill 5 air intake manifolds placed on opposite sides of the diffuser shall be the same or substantially the same or differ by a maximum of 5. In particular up to a maximum of 720. The vertical height of the two inlet manifolds shall preferably be

secondary air from 2 to 20 mm; Preferably from 3 to 18 mm, especially from 5 to 15 mm. One embodiment of the invention has the advantage that the volumetric flow of secondary air entering through the two secondary air intake manifolds can be adjusted or varied by the width c d (transverse to the machine direction m d). appropriately; For this purpose, the vertical height of the two secondary air inlet holes is adjusted or changed by width c d (transverse to machine direction m d). It is recommended that adjustments be made to the volumetric flow of the secondary air, provided that the volumetric flow of the secondary air with the internal flow decreases with respect to the direction C towards the edges of the device or towards the edges of the two secondary air intake gaps. It is preferable that the volumetric flow of the secondary air that enters through the two secondary air intake gaps in the peripheral areas of the secondary air intake gaps is less than in the central area of the two secondary air intake gaps. It is desirable that these edged areas have a length of 5 to 20 cm. suitably in edge regions a maximum of 775 is supplied; A maximum of 780 volumetric flow of secondary air entering the central region of the secondary air intake flotation is preferred. It is preferable within the Glas of the present invention that the uniform inflow of secondary air through the two secondary air intake slots occur transversely to the direction of the machine or in the width of the machine according to one of 5 embodiments of the invention” and appropriately away from the said edge areas (Tale) in the area The overall centrality of the secondary air intake vacuoles.By this connection; the invention is based on the discovery that a particularly homogeneous capillary deposition can be achieved or (Ka) a more homogeneous capillary deposition can be achieved than

During the show c d. ag A recommended embodiment of the invention is that in the direction of capillary flow a convergent section 0 ga of a diffuser or diffuser extends beyond or below the two secondary air inlet gaps. Particularly preferred here is an embodiment where it is in the direction of capillary flow after or below the two secondary air inlet holes; A The ela is closely arranged for the spreader; thence followed by a constriction of the diffuser and after or below the constriction; A divergent section is provided for the diffuser (convergent-narrow-divergent). dilate Ag A compaction of secondary air or a mixture of primary air and secondary air that has flown occurs. A preferred embodiment has the advantage that the converging part of the diffusor is smaller or much smaller than the divergent (ial) of the diffusor. appropriately; The maximum length of d

gal close spreader 760; A maximum of 750 ft gallons spaced is preferred for this spreader. It is recommended that the maximum length of the contiguous spreader is 740 l and a maximum of 735 is preferred and a maximum of 730 l is preferred for the divergent part of the spreader. Appropriately, the ratio of ad of the diffuser length sa converging to the length of divergent diffuser Ga is from 0.1 to 1, preferably from 0.15 to 0.9. ass that the length ud of the converging part of the spreader is from

5 to 750 with 10 to 750 of length for the entire spreader. It is within the scope of the invention that the maximum diffuser exit angle beta of the diffuser outlet - or gal the last arranged diffuser in the direction of capillary flow through the sedimenter is 30 preferably a maximum of 25 and preferably a maximum of 20". The exit angle of the beta diffuser is measured 0 Between the spreader wall of the divergent part of the spreader and the longitudinal central axis m of the spreader.It is preferable that the walls of the spreader be formed for the part of the spreader divergent that forms the outlet of the spreader to rotate axis so that the angle of exit of the spreader beta is variable or adjustable.It is recommended that the maximum width of the outlet of the spreader beta gal spaced spreader 7300; preferably a maximum of 7250 and preferably a maximum of 7200 of the width Lo of the exit gap of the stretching device or the shaft of the stretching device. - For the spreader from the sedimentation device or from the depositing foraminous belt, ranging from 20 mm to 300 mm, specifically from 30 mm to 150 mm, preferably from 30 mm to

0 mm. It is within the scope of the invention that a monomer extraction device is arranged between the spinneret | 0 and the cooling device. By means of this monomer extraction device, air is extracted from the filament formation space under the spindle. And this way; (Kar) removal of off-gases with attached capillaries, such as monomers, oligomers, decomposition products, and the like, from the apparatus according to the invention. Appropriately, the monomer extractor shall have one extraction chamber on At least one extraction fan at least 5 shall preferably be attached.At least one extraction saa shall be equipped with at least one extraction slot for extraction of said gases towards the capillary space.

Furthermore; The preferred embodiment of the invention contributes to a particularly effective solution to the technical problem

It is distinguished in that at least one deformable first seal is arranged between the spindle and the monomer extractor to fill a first gap formed between the spinner and the monomer extractor and/or at least one second deformable seal is provided between Monomer extraction device

monomer 5 and the cooling device to fill a second gap formed between the monomer extractor leas monomer Cooling and/or at least one third deformable seal is provided between the cooling device and the stretching device or an intermediate channel for the stretching device to fill a third gap formed between refrigeration device and device

The stretch or intermediate channel and thanks to the installation characteristics; Precisely strength

The tamping or tamping pressure of this deformable seal is variable or zone-adjustable

0 boundary or boundary surfaces of the relevant gap. It is recommended that this preferred deformable seal extend over the overall width or over the overall width c d (transversely to the machine direction) of the apparatus according to the invention. It is within the scope of the present invention that such a deformable seal rotates

Around the entire circumference or substantially around the entire circumference of the capillary flow channel. It is also within the scope of the invention that the height h of the gap to be filled with the deformable seal ranges from 5 to 35 mm; particulary

5 From 5 mm to 30 mm and that at least one deformable seal fills this height h of the gap. appropriately; Non-Blo shapes can be compensated for the height h of the gap from

By changing or re-modifying the installation properties to seal in this elevation direction. It is recommended that it can

The payment is filled or is filled with a fluid medium, and that the re-adjustment or adjustment of the payment is done by introducing the fluid medium into the payment or by removing the fluid medium from the payment. Reimbursement is preferred

0 At least one spill is an inflatable plug. According to another embodiment; The deformable seal may also have at least one sealing element which is compressed by at least one spring element at the boundary surface of the seal to be sealed. It can include an item

Tighten precisely on the sealing lip and the seal may also include a spring-loaded sealing lip. The sealing element is installed appropriately on the boundary surface of the desired gap, and pressed

5 Sealing element or sealing flange against the boundary surface opposite the gap. By virtue of which at least one deformable seal is configured, provided that the seal is made at a pressure in the capillary flow channel greater than

about 2000 Pa; Specifically, more than 2500 Pa. The embodiment with the deformable seal proved particularly successful within the Gy educational framework of the invention. In combination with the remaining features according to the invention or the preferred features of the device according to the invention, optimal aerodynamic relations are obtained in the device that effectively contributes to the solution of the technical problem according to the invention.

The invention relies on “Glas” that the device can be produced according to the invention” non-woven nets or spunbonded interconnected fibers of exceptional quality. It is specially described with a teaching aid according to the invention.” It is possible to produce both a homogeneous filament deposition and thus a homogeneous non-woven mesh in the direction of the machine (Lads) transversely in the direction of the machine. Exactly perfect homogeneous nonwoven deposition can be achieved even at higher or higher production speeds. High filament speeds can be achieved

July 0 lower filament standards using the device according to the invention; However a good homogeneous sedimentation of the capillaries. High filament speeds and low standards can be easily achieved at high production capacities or production speeds of eg over 400 min.

It should be emphasized that the device according to the invention is relatively simple and does not have a complex structure. Brief description of the drawings

15 The invention is explained in detail hereafter with reference to drawings showing only one exemplary embodiment. For the figures in the schematic view: Fig. 1: shows a vertical part through a device according to the invention; Fig. 2 shows an enlarged part A of the bottom region of the device according to the invention; Detailed description:

20 The figures show an apparatus according to the invention for producing spun bonded fibers from continuous filaments 1; Specifically made of continuous filaments 1 composed of a thermoplastic material. The device includes a spindle 2 prepared for spinning continuous filaments 1, as well as a cooling device 3 prepared for cooling the filaments. According to a particularly preferred embodiment of the invention” a monomer extractor 4 is arranged between the spinner 2 and the cooling device 3. By using this monomer extractor 4 the gases can be removed

The turbulence generated during the spinning process of the machine. These could be; For example; Cmonomers are oligomers or degradation products and similar substances. A gap 5 is formed between the monomer extractor 4 and the cooling device 3 which usually revolves around the total capillary formation space or the capillary flow space. according to a more preferred embodiment and a typical embodiment according to figures (see in particular Fig. 1); At least one deformable seal 6 shall be placed in order to bridge said gap 5 between the monomer extractor 4 and the cooling device 3. Appropriately; At least one deformable seal 6 in the gap 5 rotates around the total capillary formation space or capillary flow space. Within the scope of the invention is the possibility of changing the properties of the composition; Specifically, the pressing force or the pressing pressure (Saud) 6 for the boundary surfaces of the gap 5 or reset 0. The vertical height h of the gap 5 in the ideal embodiment may range from 5 to 30 mm where the deformable Saud 6 will at least fill the gap 5 along this vertical height h of the gap 5. Preferably in the ideal embodiment; Deformable Seal 6 includes at least one Seal 6 that can be inflated using a fluid medium. and by supplying or removing the fluid medium preferably air; It is possible to change the installation properties; namely the compressive force or compressive stress of the seal 5 6. In an ideal embodiment (see Figure 1 specifically); Cooling device 3 includes two cooling chambers arranged one above the other or in a row where the filaments can be precisely processed by process air or cooling air at different temperature. In principle; A cooler 3 with only one refrigerated chamber can be used within the scope of the invention. A stretching device 7 is arranged for stretching the capillaries 1 after the cooling device 3 and in the direction of the capillary flow f. preferably and in perfect embodiment; Following the cooling device 3 is an intermediate channel 8 Connecting the cooling device 3 to the stretching shaft 9 of the stretching device 7. In a preferred embodiment and in an ideal embodiment; The unit comprising the cooler 3 (intermediate duct 8) and the stretch shaft 9 shall be configured as a closed system system 010860. Except for the supply of cooling air in the cooler 3, no AT air is supplied to the unit 5 as the air directed through The stretching device 7 or through the stretching drive shaft 9 shown herein is indicated by primitive air p.

According to the invention, the stretcher 7 follows the direction of capillary flow and at least one diffuser sq 0. Preferably and in the ideal embodiment; Two opposite slots are provided for secondary air intake 11; 2 for secondary air intake s located between the exhauster 7 or the exhauster drive shaft 9 and the diffuser 10. Cua extend the two secondary air intake holes 11; 12 appropriately over the entire width of the device or over the entire width of the die according to the invention. According to the invention, the secondary air is supplied through the two secondary air intake holes with an inflow angle Wi of less than 100; suitably less than or equal to 90; preferably less than 80 and in an ideal embodiment this angle is less than 45". According to a highly desirable embodiment of the invention "the alpha inflow angle ranges from 0 to 960; preferably from 2 to 50". In order to achieve an internal flow angle not to; Suitable and suitable inflow guides 0 13 shall be provided in the ideal embodiment (see Figure 2 in particular) so that in the ideal embodiment they are formed in the form of inflow channels 14 joined obliquely with respect to the two secondary air Jad gaps 11 12. Where the inflow channels form The internal 14 angles in the direction of the capillary flow f or towards the central longitudinal axis m provided that the secondary air flows at a specified inward flow angle alpha. Specifically according to the Jade incarnation; An internal secondary air flow occurs almost parallel to the direction of capillary flow and 5 5

and according to a particularly desirable embodiment of the invention; The volumetric flow of the secondary air supplied can be adjusted through the two secondary air inlet holes 11; 12. Where this can be achieved precisely by Gob setting the cross-sections of the two secondary air intake slots 11; 12. In principle Lad can set different diana flows for secondary air s supplied to the two opposite slots of air intake 0 secondary 11; 12. According to one embodiment of the invention; The volumetric flow of the secondary air flowing into the two secondary air inlet holes 11 12 can be adjusted; Preferably for each of the two secondary air intake holes 11 12; Or change it transversely towards the machine or for the width c d. In this case; The volumetric flow of the secondary air flowing in the flanged areas, in the device, or in the two secondary air inlet holes 12 (11) is completely permeable compared to the central area

5 for the device or central area of the two secondary air intake holes 11; 12.

As a result of the entry of secondary air s through the two secondary air intake holes 12 (11) the primary air p is mixed with air gull s in the adjacent leaflet 10. (Gey) to a preferred embodiment of the invention” and in the area where the two secondary air intake holes 12 ¢ (11) are located The ratio of the two volumetric flows of primary air and secondary air w/t is less than 5 and preferably less than 4.5.

in perfect embodiment according to forms; Only one spreader 10 is supplied in the direction of capillary flow under the stretcher 7. In principle two or more spreaders 10 can be connected in series. wherein the augmented diffuser 10 in the perfect embodiment according to the figures has a close-fitting diffuser gia 15 located after or below the two secondary air intake slots 11; 12 direction of capillary flow and s. Preferably and in the perfect embodiment” follows the convergent diffusor gia 15 this is a region of narrowing 16 of the diffusor 10. Preferably

0 The diffuser 10 in the ideal embodiment is furnished with a spaced diffuser part 17; the direction of the capillary flow and s located after or below Gada 16; Bg is desirable for the perfect embodiment; The dispersed part of the spreader 7 from the spreader 10 in the direction of the capillary flow s is longer or much longer than the converging part of the spreader 5. Preferably and in the ideal embodiment; The length of the close diffuser gad 15 is 0 less than the length of the divergent diffuser gad 17.

It is desirable and in the perfect embodiment; The angle of outlet of the spreader beta between the spreader wall 18 of the spreader portion 17 and the longitudinal central axis m of the spreader 14 dad is 25" max. Appropriately and in an ideal embodiment, the width B of the outlet outlet 19 is 7300 max." (aby 7250) max. of tb width for outlet gap 20 of shaft stretch 9.

The continuous filaments 1 emanating from the spreader 10 are deposited on a sedimentator shaped in the shape of a pore-sedimentation belt 21 to deposit the filaments or to form the non-woven mesh 22. The settled filaments or non-woven mesh 22 are transported away by the sedimentation belt 21 towards the machine MD . According to the invention, an extraction device is provided to extract or treat the air through a sedimentation device or through a sedimentation belt 21. For this purpose, an extraction area is arranged.

5 23 under the outlet of the spreader 19 and preferably have a width b" towards the machine md. Where this width b" of the extraction area 23 according to the invention is greater than the width b of the outlet of the spreader 19. It was done

Both widths b and b are illustrated in Fig. 2. gg For a preferred embodiment of the invention, the width b of extraction zone 23 is at least 1.2 times greater than the width b of spreader outlet 19; preferably at least 3 times. In an ideal embodiment the width b of spreader outlet is measured 19 as the horizontal distance between the lower ends of the spreader walls 18. If the ends of the spreader walls 18 of the spreader part 17 do not end at the same horizontal level or do not end at the same vertical height, the distance from the end of the longer wall of the spreader 18 is measured from the end of the shorter wall of the spreader 18

So that it is visualized as the distance spanned at the same vertical height. The extraction zone 23 located under the borehole sedimentation belt 21 is determined by the diaphragms 27 and 28, which are arranged respectively towards the machine MD. The measurement of the width b" of the extraction zone 23 is given as the distance 0 between the diaphragms 27 and 28, specifically the distance between the upper ends of the diaphragms 27 and 28. It can be observed particularly from Figure 2 and regarding the direction of the machine md after the filament deposition zone 1 that the extraction zone 23 is protruded by oa The first extraction 24 is located after the spreader exit 19 or after supply b of the spreader exit 19. Moreover, for the direction of the machine MD before the capillary deposition zone 1 the extraction zone 23 is accentuated by oa a second extraction 25 is located after the exit 5 of the spreader 19 or after rendering b of publisher output 19. It can also be seen from Fig. 2 that first extract grad 24 rendered b" aly second extract 25 rendered b) 0 gg for one embodiment and in the perfect embodiment; Displays B and B are the same. But in terms of hall, Lad

to be different. Specifically; As a result of the configuration of the extraction zone 23 according to the invention »extraction 0 takes place by means of a pore sedimentation belt 21 provided that the triple air flow is in the outlet area of the diffuser 19; along the outer surfaces 26 towards the pore sedimentation belt 21. According to a preferred embodiment ald the tertiary air flows are aligned parallel or Sle substantially to the mixed flow consisting of primary air p and secondary air s flowing towards the diffuser outlet 19 into the diffuser 10 . And therefore; According to a very favorable embodiment of the invention; Primary air p and secondary air s plus 5 tertiary air s are sucked out through the pore sedimentation belt 21. Appropriately the primary air flows

— 7 1 — cg secondary air s and tertiary air t flow parallel or near-parallel through the sedimentation belt ol 21

Claims (1)

Elements of Protection 1- A device for producing spunbonds from continuous filaments (1) + specifically from Cus cthermoplastic material, including a spinneret (2) at least one intended for spinning continuous filaments ( 1); cooling device; 3) at least one intended for cooling the filaments; At least one stretching device (7) prepared for stretching the capillaries and at least one depositing device, specifically in the form of a depositing foraminous belt (21) prepared for deposition of the capillaries to form a nonwoven network. web where at least one diffuser (10) is supplied between the stretcher (7) and the sedimentator or sedimentation belt (21) so that the capillaries and primary air from the stretcher 0 enter the diffuser (10) where in the area in which at least one diffuser (10) is located; at least two secondary air inlet gaps (11 12) shall be provided on opposite sides of the diffuser (10) where secondary air is entered into the diffuser (10); Where a secondary air inlet gap (11” 12) is formed one on (J) provided that the secondary air flows at an inflow angle (alpha) with respect to the filament flow direction 5 s or with respect to the central plane longitudinal central plane m of the device or diffuser (10); where this inflow angle is less than 100 in the direction of the capillary flow”; the convergent diffuser section (15) extends beyond or below the two air inlet holes Secondary Cus (12 ¢11) secondary air inlet gaps in the direction of the capillary flow” following a constriction of a diffuser (15) a constriction zone of a diffuser (10) 0 and where the constriction zone is followed by at least one divergent diffuser portion (17) wherein Design a convergent spreader ha (15) being shorter or substantially shorter than a divergent spreader (17) and where the length of the converging spreader part (15) is a maximum of 760 times the length of the divergent spreader part (17); where the spreader part has The latter is in the direction of the capillary flow and creates walls of the diffuser 5 (18) where the sedimentation apparatus slash deviates, forming the walls of the diffuser ( 18) This is a way out for the publisher diffuser outlet (19) and have a width b in relation to the machine direction m d where at least one extraction device is provided to extract the air or process air passing through the sedimentation device or through the puncture sedimentation belt (21) and where An extraction region (23) shall be provided below the publisher exit (19) and shall have a width “b” in the direction of AN greater than the width b of the publisher outlet (19) 2- Device Ga, of claim 1; where The width b" of the extraction region (23) is greater than the width b of the diffuser outlet (19) by at least 1.2 times. 3- Device Ga, of claim 1, where the extraction region stands out (23) Regarding the machine direction » d after the deposition region in 0 capillaries say extraction section (first) (24) above the diffuser outlet (19) and/or Where the extraction area appears relative to the direction of the machine MD before the sedimentation area in the capillaries in the (QU) extraction section (25) above the outlet of the diffuser (19). l Where extraction takes place by extraction device so that it is at least in the diffuser outlet (19) area; 5 Tertiary air flows along the outer surfaces of the diffuser walls (18) towards the deposition device or the depositing foraminous belt (21)” where it is preferable that the air flows are aligned AMEN is parallel or substantially parallel to the mixed flow consisting of primary air and secondary air flowing towards the diffuser outlet (19) into the diffuser (10); where the EN air is also extracted through a device 0 Sedimentation or through the depositing foraminous belt (21). initial air .secondary air and primary air 6—the device of claim 1; Wherein the subassembly comprising 5 the cooling device (3) and the stretching device (7) forms as a closed sub-assembly, so that besides supplying cooling air in the canal device no flow occurs middle extra fluid or air to this closed sub-structure. 7- The device according to Claim 1, where the diffuser outlet angle is beta with respect to the longitudinal central axis of the diffuser, with a maximum of (10) dad °30. 8- The device according to Clause 1 where the distance of extension of the diffuser (10) or the bottom edge of the diffuser (10) from the deposition device or from the sedimentation belt_EE mm is from 20 to 300 mm (21) depositing foraminous belt ¥ z 1 L ¢ EE ! | . i vy for | —1 Vy a 1 / k tn" | iy 857 A 17 ; YY ab y l ld vr aa ST LI 19 | love d 7 b 1 ˚ Yy 1 fig NY 1 1] um p Vv \ alpha ye b bl = AR: bo arat \¥: 7 z A YY 11 oJ a to vi} oo 1 Le VY | VA Y1 | -¥3 WJ 5 La Aq [se b c. Square Y: . (b)| b" ls vy YV. 3 0 | YA YY re = Fig. ? Sued Authority for Intellectual Property RE .¥ + \ A 0 § 8 Ss o + < M SNE A J > E K J TE I UN BE Ca a a a ww > Ld Ed H Ed - 2 Ld, provided that the annual financial consideration is paid for the patent and that it is not null and void for violating any of the provisions of the patent system, layout designs of integrated circuits, plant varieties and industrial designs, or its implementing regulations. Ad Issued by + bb 0.b The Saudi Authority for Intellectual Property > > > This is PO Box 1011 .| for ria 1*1 v= ; Kingdom | Arabic | For Saudi Arabia, SAIP@SAIP.GOV.SA